Show the cardholder's date of birth in the «Payment Information» backend block

[dmitrii-fediuk]

It is related to:

• Add the «Date of Birth» field to the bank card payment form

It would be similar to:

• Show the cardholder's CPF (tax ID) in the «Payment Information» backend block

[dmitrii-fediuk]

It looks like I have already implemented it in the 0.8.8 version: